Regions with different effect of the X-ray irradiation in the diagrams of X-ray luminosity (L_X) vs. the optical depth parameter (t_X). Graphs are plotted for individual model stars in Table 1. Individual symbols denote positions of: models with negligible influence of X-ray irradiation (black plus, +), models where X-ray irradiation leads to the decrease of the wind terminal velocity (red cross, ×), non-degenerate components of HMXBs from Table 4 (filled circles, •), and individual components of X-ray binaries from Table 5 (empty circles, ⊙). The regions of the L_X − t_X parameters that lead to the wind inhibition are denoted using the shaded area (■).